A 16-year study of over 3,000 children revealed that persistent childhood lying, especially when coupled with aggression and impulsivity, can be an early indicator of future social and behavioural difficulties. While occasional dishonesty is normal, a consistent pattern of deception in youth was linked to a higher likelihood of antisocial traits and criminal involvement in adulthood. Researchers stress observing long-term behavioural trends for insights into a child's well-being.